Question
Solution
Demand is an economic concept that relates to a consumer's desire to purchase goods and services and willingness to pay a specific price for them. An increase in the price of a good or service tends to decrease the quantity demanded.
Match the following machines with their working principles:
(i) Electric motor - (a) Heat energy into mechanical energy
(ii) Steam engin...
Which of the following is not a nuclear reaction?
Water flows through a horizontal pipe at a constant volumetric rate. At a location where the cross sectional area decreases, the velocity of the fluid:
A fish inside water (μ = 4/3) sees the world above through a circular “window” due to total internal reflection. The angular diameter of this windo...
A copper block of mass 3 kg is heated in a furnace to a temperature of 450°C and then placed on a large ice block. Find the maximum amount of ice that...
The balance point in a potentiometer for a cell of emf 1.5 V is 60 cm. If a resistance of 5 Ω is connected in parallel with the cell and the new balanc...
When is the magnetic field strength considered strongest?
One kilogram of ice at 0° C is mixed with one kilogram of water at 85° C. The final temperature of the mixture is
(Tale specific heat of ...
Current sensitivity of a moving coil galvanometer is 9 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is 30 div/V. The...
A convex mirror and a concave mirror face each other at a distance of 30 cm. A point object is placed midway. The final image formed by double reflectio...
